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OBJECTIVE: To develop a psychotherapy rating scale to measure therapist adherence in the Strong Without Anorexia Nervosa (SWAN) study, a multi-center randomized controlled trial comparing three different psychological treatments for adults with anorexia nervosa. The three treatments under investigation were Enhanced Cognitive Behavioural Therapy (CBT-E), the Maudsley Anorexia Nervosa Treatment for Adults (MANTRA), and Specialist Supportive Clinical Management (SSCM). METHOD: The SWAN Psychotherapy Rating Scale (SWAN-PRS) was developed, after consultation with the developers of the treatments, and refined. Using the SWAN-PRS, two independent raters initially rated 48 audiotapes of treatment sessions to yield inter-rater reliability data. One rater proceeded to rate a total of 98 audiotapes from 64 trial participants. RESULTS: The SWAN-PRS demonstrated sound psychometric properties, and was considered a reliable measure of therapist adherence. The three treatments were highly distinguishable by independent raters, with therapists demonstrating significantly more behaviors consistent with the actual allocated treatment compared to the other two treatment modalities. There were no significant site differences in therapist adherence observed. DISCUSSION: The findings provide support for the internal validity of the SWAN study. The SWAN-PRS was deemed suitable for use in other trials involving CBT-E, MANTRA, or SSCM.

Original publication

DOI

10.1002/eat.22455

Type

Journal article

Journal

Int J Eat Disord

Publication Date

12/2015

Volume

48

Pages

1170 - 1175

Keywords

CBT-E, MANTRA, SSCM, anorexia nervosa, randomized controlled trial, therapist adherence, Adult, Anorexia Nervosa, Australia, Cognitive Therapy, Female, Guideline Adherence, Health Personnel, Humans, Observer Variation, Patient Compliance, Psychometrics, Psychotherapy, Reproducibility of Results, Young Adult